Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Digital_AMPS> ?p ?o }
- Digital_AMPS abstract "IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS), and a further development of the north-american 1G mobile system AMPS. It was once prevalent throughout the Americas, particularly in the United States and Canada since the first commercial network was deployed in 1993. D-AMPS is considered end-of-life, and existing networks have mostly been replaced by GSM/GPRS or CDMA2000 technologies.This system is most often referred to as TDMA. That name is based on the abbreviation for time division multiple access, a common multiple access technique which is used in most 2G standards, including GSM, as well as in IS-54 and IS-136. However, D-AMPS has been competing against GSM and systems based on code division multiple access (CDMA) for adoption by the network carriers, although it is now being phased out in favor of GSM/GPRS and CDMA2000 technology.D-AMPS uses existing AMPS channels and allows for smooth transition between digital and analog systems in the same area. Capacity was increased over the preceding analog design by dividing each 30 kHz channel pair into three time slots (hence time division) and digitally compressing the voice data, yielding three times the call capacity in a single cell. A digital system also made calls more secure because analog scanners could not access digital signals. Calls were encrypted, although the algorithm used (CMEA) was later found to be weak.IS-136 added a number of features to the original IS-54 specification, including text messaging, circuit switched data (CSD), and an improved compression protocol. SMS and CSD were both available as part of the GSM protocol, and IS-136 implemented them in a nearly identical fashion.Former large IS-136 networks included AT&T in the United States, and Rogers Wireless in Canada. AT&T and Rogers Wireless have upgraded their existing IS-136 networks to GSM/GPRS. Rogers Wireless removed all 1900 MHz IS-136 in 2003, and has done the same with its 800 MHz spectrum as the equipment failed. Rogers deactivated its IS-136 network (along with AMPS) on May 31, 2007. AT&T soon followed in February 2008, shutting down both TDMA and AMPS.Alltel, who primarily uses CDMA2000 technology but acquired a TDMA network from Western Wireless, shut down its TDMA and AMPS networks in September 2008. US Cellular, which now also primarily uses CDMA2000 technology, shut down its TDMA network in February 2009.IS-54 is the first mobile communication system which had provision for security, and the first to employ TDMA technology.".
- Digital_AMPS wikiPageExternalLink tdmaGsmFAQ.html.
- Digital_AMPS wikiPageExternalLink tdma-notification.jsp.
- Digital_AMPS wikiPageExternalLink channels.html.
- Digital_AMPS wikiPageExternalLink 1990s.html.
- Digital_AMPS wikiPageExternalLink paper-cmea.pdf.
- Digital_AMPS wikiPageID "483974".
- Digital_AMPS wikiPageLength "19226".
- Digital_AMPS wikiPageOutDegree "66".
- Digital_AMPS wikiPageRevisionID "673912712".
- Digital_AMPS wikiPageWikiLink 1G.
- Digital_AMPS wikiPageWikiLink 2G.
- Digital_AMPS wikiPageWikiLink AT&T_Mobility.
- Digital_AMPS wikiPageWikiLink Advanced_Mobile_Phone_System.
- Digital_AMPS wikiPageWikiLink Alltel.
- Digital_AMPS wikiPageWikiLink American_National_Standard.
- Digital_AMPS wikiPageWikiLink American_National_Standards_Institute.
- Digital_AMPS wikiPageWikiLink Americas.
- Digital_AMPS wikiPageWikiLink Analogue_electronics.
- Digital_AMPS wikiPageWikiLink Authentication.
- Digital_AMPS wikiPageWikiLink Backward_compatibility.
- Digital_AMPS wikiPageWikiLink Backward_compatible.
- Digital_AMPS wikiPageWikiLink Baud.
- Digital_AMPS wikiPageWikiLink Bell_Labs.
- Digital_AMPS wikiPageWikiLink C-Netz.
- Digital_AMPS wikiPageWikiLink CDMA2000.
- Digital_AMPS wikiPageWikiLink Canada.
- Digital_AMPS wikiPageWikiLink Category:1990_introductions.
- Digital_AMPS wikiPageWikiLink Category:Channel_access_methods.
- Digital_AMPS wikiPageWikiLink Cellular_Message_Encryption_Algorithm.
- Digital_AMPS wikiPageWikiLink Channel_access_method.
- Digital_AMPS wikiPageWikiLink Circuit_switching.
- Digital_AMPS wikiPageWikiLink Code-excited_linear_prediction.
- Digital_AMPS wikiPageWikiLink Code_Excited_Linear_Prediction.
- Digital_AMPS wikiPageWikiLink Code_division_multiple_access.
- Digital_AMPS wikiPageWikiLink Digital_data.
- Digital_AMPS wikiPageWikiLink Dobson_Cellular.
- Digital_AMPS wikiPageWikiLink Dobson_Communications.
- Digital_AMPS wikiPageWikiLink Electronic_Industries_Alliance.
- Digital_AMPS wikiPageWikiLink End-of-life_(product).
- Digital_AMPS wikiPageWikiLink Europe.
- Digital_AMPS wikiPageWikiLink FDMA.
- Digital_AMPS wikiPageWikiLink Frequency-division_multiple_access.
- Digital_AMPS wikiPageWikiLink GSM.
- Digital_AMPS wikiPageWikiLink General_Packet_Radio_Service.
- Digital_AMPS wikiPageWikiLink Global_System_for_Mobile_Communications.
- Digital_AMPS wikiPageWikiLink Hertz.
- Digital_AMPS wikiPageWikiLink Hicap.
- Digital_AMPS wikiPageWikiLink Japan.
- Digital_AMPS wikiPageWikiLink MHz.
- Digital_AMPS wikiPageWikiLink Mobile_communication.
- Digital_AMPS wikiPageWikiLink Mobile_telephony.
- Digital_AMPS wikiPageWikiLink Motorola.
- Digital_AMPS wikiPageWikiLink Multiple_access.
- Digital_AMPS wikiPageWikiLink New_York_City.
- Digital_AMPS wikiPageWikiLink Nippon_Telegraph_and_Telephone.
- Digital_AMPS wikiPageWikiLink Nordic_Mobile_Telephone.
- Digital_AMPS wikiPageWikiLink Nordic_countries.
- Digital_AMPS wikiPageWikiLink North_America.
- Digital_AMPS wikiPageWikiLink Personal_Communications_Service.
- Digital_AMPS wikiPageWikiLink Republic_of_Ireland.
- Digital_AMPS wikiPageWikiLink Rogers_Wireless.
- Digital_AMPS wikiPageWikiLink Short_Message_Service.
- Digital_AMPS wikiPageWikiLink Short_message_service.
- Digital_AMPS wikiPageWikiLink Telecommunications_Industry_Association.
- Digital_AMPS wikiPageWikiLink Time_division_multiple_access.
- Digital_AMPS wikiPageWikiLink Total_Access_Communication_System.
- Digital_AMPS wikiPageWikiLink U.S._Cellular.
- Digital_AMPS wikiPageWikiLink UMTS.
- Digital_AMPS wikiPageWikiLink US_Cellular.
- Digital_AMPS wikiPageWikiLink United_Kingdom.
- Digital_AMPS wikiPageWikiLink United_States.
- Digital_AMPS wikiPageWikiLink Universal_Mobile_Telecommunications_System.
- Digital_AMPS wikiPageWikiLink Vector_Sum_Excited_Linear_Prediction.
- Digital_AMPS wikiPageWikiLink Vector_sum_excited_linear_prediction.
- Digital_AMPS wikiPageWikiLink Western_Wireless.
- Digital_AMPS wikiPageWikiLink Western_Wireless_Corporation.
- Digital_AMPS wikiPageWikiLinkText "D-AMPS TDMA".
- Digital_AMPS wikiPageWikiLinkText "D-AMPS".
- Digital_AMPS wikiPageWikiLinkText "D-AMPS/TDMA".
- Digital_AMPS wikiPageWikiLinkText "Digital AMPS ("TDMA")".
- Digital_AMPS wikiPageWikiLinkText "Digital AMPS".
- Digital_AMPS wikiPageWikiLinkText "IS-136".
- Digital_AMPS wikiPageWikiLinkText "NAMPS".
- Digital_AMPS wikiPageWikiLinkText "TDMA".
- Digital_AMPS wikiPageWikiLinkText "Time division multiple access".
- Digital_AMPS hasPhotoCollection Digital_AMPS.
- Digital_AMPS wikiPageUsesTemplate Template:Citation_needed.
- Digital_AMPS wikiPageUsesTemplate Template:Mobile_telecommunications_standards.
- Digital_AMPS wikiPageUsesTemplate Template:More_footnotes.
- Digital_AMPS wikiPageUsesTemplate Template:Refimprove.
- Digital_AMPS wikiPageUsesTemplate Template:Reflist.
- Digital_AMPS subject Category:1990_introductions.
- Digital_AMPS subject Category:Channel_access_methods.
- Digital_AMPS hypernym Systems.
- Digital_AMPS type Article.
- Digital_AMPS type Place.
- Digital_AMPS type Article.
- Digital_AMPS comment "IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS), and a further development of the north-american 1G mobile system AMPS. It was once prevalent throughout the Americas, particularly in the United States and Canada since the first commercial network was deployed in 1993. D-AMPS is considered end-of-life, and existing networks have mostly been replaced by GSM/GPRS or CDMA2000 technologies.This system is most often referred to as TDMA.".
- Digital_AMPS label "Digital AMPS".